The expected number of cases per 10,000 in the base situation could be higher in large metropolitan areas because of emissions from motor vehicles and other sources of pollution. This appears to be borne out by the higher total number of cases per 10,000 for Kuala Lumpur where the minimum, maximum, and mean daily API readings are all higher than for Johor. The number of cases per day per 10,000 in the base situation for Kuala Lumpur may be four persons rather than three, for example, but this can only be assumed and is not verifiable with the existing information.